\part{part}
	part text
	part text
\chapter{chapter long title}
 chapter text
 chapter text
 \[
	 f(x)=x^2
 \]
\section[for the toc]{section}
 section text
 section text
\section[for the toc]{section}
 section text
 section text
\subsection[for the toc]{subsection}
	subsection text
	subsection text
\subsection[for the toc]{subsection}
	subsection text
	subsection text
\section[for the toc]{section}
 section text
 section text
\chapter{chapter}
 chapter text
 chapter text
\part{part}
	part text
	part text
\chapter[toc]{chapter title}
 chapter text
 chapter text
\section[for the toc]{section}
 section text
 section text
\subsubsection[for the toc]{subsubsection}
	subsubsection text
	subsubsection text
\paragraph{paragraph}
	paragraph text
	paragraph text
\subparagraph{subparagraph}
	subparagraph text
	subparagraph text
\section[for the toc]{section}
 section text
 section text
\subsubsection[for the toc]{subsubsection}
	subsubsection text
	subsubsection text
\paragraph{paragraph}
	paragraph text
	paragraph text
\subparagraph{subparagraph}
	subparagraph text
	subparagraph text
\chapter[somethingelse]{goes here}
